When you lie, and make your love partener agree to take a shit. Little does he/she know while they are taking the shit which is on a toilet, you push down on them hard so they get wedged in the toilet seat. You proceed to slap them wiv your penis, or dildo, until both cheeks are sevearly bruised.

"Hello hunny, i fancy partaking in a weird sexual fantasy, will you go take a shit we can use later?".....